#define pro __attribute__((optimize("-Os")))char cha[90000000],*ptr=cha;char chout[10000000],*pout=chout;pro inline void read(int &x) {     bool flag = 0;register char c;     while((c=getchar())>'9'||c<'0')       if(c == '-') flag = 1;     x = c-'0';     while((c=getchar())<='9'&&c>='0')      x = ((x<<1)+(x<<3))+c-'0';     if(flag) x = -x;  }pro inline void out(int x) {    if(!x)*pout++='0';    int p=0;char buf[10];    while(x) buf[++p]=x%10+'0',x/=10;    while(p) *pout++=buf[p--];    *pout++='\n';}int main(){    fread(ptr,1,90000000,stdin);    x=read();    out(x);    fwrite(chout,1,pout-chout,stdout);}